First formation (TO-1): Neocomian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Actinopteri - Osteoglossiformes - Lycopteridae
Aokiichthys sp. Yabumoto 1994
KMNH VP 100,159
Aokiichthys toriyamai n. gen., n. sp. Yabumoto 1994
holotype: KMNH VP 100,160, paratypes: 162-165
Aokiichthys praedorsalis n. sp. Yabumoto 1994
holotype: KMNH VP 100,155; paratypes: 156-158
Aokiichthys uyenoi n. sp. Yabumoto 1994
holotype: KMNH VP 100,176; paratypes: 177-182
Aokiichthys otai n. sp. Yabumoto 1994
holotype: KMNH VP 100,173; paratypes174-175
Aokiichthys changae n. sp. Yabumoto 1994
holotype: KMNH VP 100,166; paratype: 100,167
Actinopteri - Ichthyodectiformes
Chuhsiungichthys yanagidai n. sp. Yabumoto 1994
holotype: KMNH VP 100,148, paratype: 100,149
Actinopteri - Lepisosteiformes
Lepidotes macropterus n. sp. Yabumoto 1994
holotype: KMNH VP 100,146
Actinopteri - Amiiformes - Amiidae
Nipponamia satoi n. gen., n. sp. Yabumoto 1994
holotype: KMNH VP 100,147
Gastropoda - Thiaridae
Brotiopsis wakinoensis
Bivalvia - Unionida - Unionidae
Plicatounio naktongensis Kobayashi and Suzuki 1936
sub species naktongensis
see common names

Geography
Country:Japan State/province:Fukuoka
Coordinates: 33.8° North, 130.9° East (view map)
Paleocoordinates:41.1° North, 132.6° East
Basis of coordinate:stated in text
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
10 m.y. bin:Cretaceous 1-2
Key time interval:Neocomian
Age range of interval:145.00000 - 125.77000 m.y. ago
Stratigraphy
Geological group:Wakino Formation:First
Stratigraphy comments: The first formation (the lower formation W1) correlates to the Sengoku Formation. The formation is distributed along the Murasaki River in Kokuraminami-ku.
Lithology and environment
Primary lithology: lithified conglomerate
Secondary lithology: lithified "shale"
Includes fossils?Y
Lithology description: The basal part consists of a conglomerate of limestone, chert and others. The conglomerate involves large pebbles. There is a limestone conglomerate about 50m from the base. Most conglomerates are breccia and the pebbles are small in size. The main part is composed of abundant conglomerate and green-gray sandstone in the area along the Murasaki River. The upper part consists of alternating black sandstone and black sandy shale along the Murasaki River. Fish fossils are found in green-gray shale and yellowish-gray shale of three horizons in the main part at Tokuriki
Environment:terrestrial indet.
Taphonomy
Modes of preservation:adpression
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some genera
Collection methods:chemical,peel or thin section
Reason for describing collection:taxonomic analysis
Collection method comments: All fossil specimens used in the present study are deposited in the Kitakyushu Museum and Institute of Natural History (NMNH)

Some specimens were immersed in a bath of 20% HCl and 80% water in 24-48 hours to etch their bones. Latex peels were made from the etched fossils for observation.

The outline of large specimens were drawn by tracing the enlarged positive films and detailed drawings were made with a binocular microscope.
Metadata
Database number:145243
Authorizer:M. Bell Enterer:M. Bell
Modifier:M. Bell
Created:2013-05-30 20:00:31 Last modified:2013-05-30 07:33:17
Access level:the public Released:2013-05-30 20:00:31
Creative Commons license:CC BY
Reference information

Primary reference:
46901. Y. Yabumoto. 1994. Early Cretaceous freshwater fish fauna in Kyushu, Japan. Bulletin of the Kitakyushu Museum of Natural History 13:107-254 [M. Bell/M. Bell]